a very ambiguous term based on whether not one is or isn't actually in a fraternity. In the South, among actaul fraternity members, fratty refers to the sterotypical southern frat guy image, that of new balance tennis shoes,ralph lauren polo shirts, rainbow or reef sandals,patagonia jackets, ray-ban/costa del mar/maui jim sunglasses with croakies, private schooling, shaggy hair and khaki shorts...etc. It is used as an adjective to describe things associated with said lifestyle.

Among other people, usually GDI or those in the north, fratty refers to a differently held stereotype of a frat guy. Such stereotype includes abercrombie t shirts, spiked hair, tribal tattoos, cargo shorts, popped collar...things that southern "fratty" guys actually find ridiculous, especially collar popping.

My professor is totally fratty, he wears polo to class every day and I saw him with croakies the other day.

That guy was looking mighty fratty the other day in a seersucker suit with a bowtie.

the way of life lived by young southern gentlemen involving being well dressed, yet relaxed and enjoying activities like shacking, golf, tennis, deep sea fishing, hunting, football tailgates, skiing, bronzing at the beach or lake, drinking, and exuding unmistakable confidence all the time and denouncing sketchiness and douchebaggery.

chartering a boat for the day and doing some fishing while bronzing and killing a cooler of ice cold beer is fratty

sipping a bourbon and coke before the game while mingling with beautiful ladies in their game day best

something referring to the greek community, can be either female or male. is often imitated by members outside the greek community also known as tools or gdi's. a lifestyle not just a style. Common fratty things are the horse (polo), the gator (lacoste), NEVER Tommy Hilfieger, the North Face, mountain hardware, reefs/rainbows, brooks brothers, tailgating, chapter meetings, shacking, being generally better than gdi's.

Being in a top tier fraternity, dressing like a true frat star. Wearing some of the basic frat star gear consisting of Southern Proper, Southern Marsh, Southern Tide, Southern Point, Guy Harvey, Columbia pfg, Mountain hardware, North face, Vineyard Vines, Patagonia, Ralph Lauren button-ups, bow ties, Sperry Top siders, Raybans, mirrored lense costa del mars with the croakies and depending on preference usually a white adjustable hat with your school logo or mascot on it(not a fucking flat brim snapback bullshit). Must pull mad tail or otherwise known as slam pieces and pee in their butts. Must get shitty or rage face a good majority of the week but don't fuck up in school or neglect your school work like a fucking GDI. Treat southern belles with proper respect except in the bedroom. Must drink bourbon whiskey, drink all sorts of beer(only shit made in merica), most likely us some sort of tobacco product may it be dip, chew or cigs. And last DON'T ACT LIKE A FUCKING GDI!